DE208664C - - Google Patents
Info
- Publication number
- DE208664C DE208664C DENDAT208664D DE208664DA DE208664C DE 208664 C DE208664 C DE 208664C DE NDAT208664 D DENDAT208664 D DE NDAT208664D DE 208664D A DE208664D A DE 208664DA DE 208664 C DE208664 C DE 208664C
- Authority
- DE
- Germany
- Prior art keywords
- metal
- tube
- sleeve
- slag
- thermocouple
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000002184 metal Substances 0.000 claims description 16
- 229910052751 metal Inorganic materials 0.000 claims description 16
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 14
- 229910052742 iron Inorganic materials 0.000 claims description 7
- 239000000155 melt Substances 0.000 claims description 5
- 239000002893 slag Substances 0.000 claims description 5
- 239000011248 coating agent Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 claims description 2
- 229910052573 porcelain Inorganic materials 0.000 claims description 2
- 230000001681 protective Effects 0.000 claims description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims 2
- 230000002633 protecting Effects 0.000 claims 2
- 150000001875 compounds Chemical class 0.000 claims 1
- 230000001066 destructive Effects 0.000 claims 1
- 229910052759 nickel Inorganic materials 0.000 claims 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 239000003517 fume Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000002925 chemical effect Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910001338 liquidmetal Inorganic materials 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 229910052904 quartz Inorganic materials 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/08—Protective devices, e.g. casings
- G01K1/10—Protective devices, e.g. casings for preventing chemical attack
Description
KAISERLICHESIMPERIAL
PATENTAMT.PATENT OFFICE.
hoher Temperaturen.high temperatures.
So einfach die Ermittlung hoher Temperaturen mit Hilfe von thermoelektrischen Pyrometern oder Widerstandsthermometern im Prinzip ist, so bietet die praktische Ausführung infolge der schädlichen chemischen Einwirkungen der heißen Gase auf die als Meßdrähte ο. dgl. zur Verwendung kommenden Metalle doch große Schwierigkeiten. Es gelingt oft nur schwer, diese Einwirkungen durchSo easy to determine high temperatures with the help of thermoelectric pyrometers or resistance thermometers is in principle, so offers the practical implementation as a result of the harmful chemical effects of the hot gases on the measuring wires ο. Like. Coming to use metals but great difficulties. It succeeds often difficult to get through these influences
ίο Schutzhüllen usw. fernzuhalten. So ist es bisher nicht gelungen, die Temperatur von Metallsalzschmelzen (wie sie z. B. bei bestimmten Härteöfen angewendet werden) oder flüssigen Metallen (z. B. von Bleibädern) dauernd messen zu können, ohne mit bedeutenden Unkosten infolge beständiger Zerstörung der in die Schmelzen eingetauchten pyrometrischen Apparate rechnen zu müssen. Die Ursache der Zerstörung ist eine doppelte, näm-Hch einesteils die Schlackenschicht, welche an der Oberfläche der Schmelze jede metallene Schutzmontieruhg stark angreift, anderenteils die Metalldämpfe, welche die das Thermoelement o. dgl. umgebenden Metallrohre durch- dringen und es zerfressen. Man mußte Mittel suchen, um diesen beiden Einwirkungen entgegenzutreten und sucht dies fast allgemein .durch ein Doppelrohr zu erreichen, wobei die Ausführung sehr verschieden ist. Z. B. ist erfahrungsgemäß ein glasiertes Rohr aus Marq u ar dt scher Masse für Metalldämpfe undurchlässig, es gelingt aber schwer, dieses Rohr, ohne daß es springt, in die heiße Flüssigkeit einzuführen oder nach Bedarf ausίο keep protective covers etc. away. That's the way it is So far it has not been possible to measure the temperature of molten metal salts (as it is, for example, at certain Hardening ovens are used) or liquid metals (e.g. from lead baths) can be measured without incurring significant expense due to constant destruction of the pyrometric immersed in the melt Apparatus to have to calculate. The cause of the destruction is twofold, viz on the one hand the slag layer, which on the surface of the melt every metal Schutzmontieruhg strongly attacks, on the other hand the metal vapors, which penetrate the metal pipes surrounding the thermocouple or the like. penetrate and eat it up. Means had to be found to counter these two influences and almost generally tries to achieve this through a double pipe, whereby the Execution is very different. For example, experience has shown that a glazed pipe made of Marq u ar dt shear mass impermeable to metal vapors, but it is difficult to achieve this Insert the tube into the hot liquid or exit it as required without it cracking
derselben herauszuziehen. Auch kann man durch Ausfüllen des Zwischenraumes zweier ineinandersteckender Eisenrohre mit Kieselgur, Quarzpulver usw. eine undurchdringliche Zwischenschicht herstellen, die auch nach Zerstörung des äußeren Eisenrohres der Schlacke standhält. Ferner hat man ein Quarzglasrohr innerhalb eines Graphitrohres angewandt für ähnliche Zwecke, indem man überall den Ge-^ danken verfolgt, gleichzeitig Dämpfe und Schlacke unschädlich zu machen.pull out the same. You can also fill in the space between two interlocking iron pipes with kieselguhr, quartz powder, etc. an impenetrable one Establish intermediate layer that will keep the slag even after the outer iron pipe has been destroyed withstands. Furthermore, a quartz glass tube has been used inside a graphite tube for similar purposes, in that one pursues the thought everywhere, simultaneously fumes and To render slag harmless.
Die Erfindung verfolgt nun den Zweck, auf einem anderen einfachen Wege beide schädliche Einflüsse bei Thermoelementen und Widerstandsthermometern von diesen selbst fernzuhalten und ihnen eine lange Lebensdauer bei beständiger Benutzung zu sichern.The invention now pursues the purpose of both damaging in another simple way To keep the influences of thermocouples and resistance thermometers away from them and give them a long service life secure with constant use.
Das Thermoelement oder der Widerstandsdraht werden zunächst in üblicher Weise mit Porzellan umgeben und mit diesem in einem Rohr angeordnet, welches mit einem galvanisehen Metallüberzug versehen ist, um die Metalldämpfe fernzuhalten. Ein stark vernickeltes, unten geschlossenes Eisenrohr hat sich z. B. als völlig undurchlässig ■ für derartige Metalldämpfe erwiesen und bietet in seinem ' Innern dem Meßdraht wirksam Schutz. Der Metallüberzug darf mit der Schmelze nicht in unmittelbare Berührung kommen, und dazu dient ein ihn umgebendes Eisenrohr. Dieses Rohr wird an der Stelle, an der es die Oberfläche der Schmelze durchdringt, verstärkt, z. B. durch eine darüber geschobene Muffe, welche gleichfalls aus Metall bestehen kann,The thermocouple or the resistance wire are first used in the usual way Porcelain surrounded and arranged with this in a tube, which is galvanized with a Metal plating is provided to keep the metal fumes away. A heavily nickel-plated, iron pipe closed at the bottom has z. B. as completely impermeable ■ for such Metal vapors have been shown to provide effective protection for the measuring wire inside. Of the Metal coating must not come into direct contact with the melt, and in addition an iron pipe surrounding it serves. This pipe will be at the point where it's the surface the melt penetrates, reinforces, z. B. by a sleeve pushed over it, which can also be made of metal,
Claims (3)
Publications (1)
Publication Number | Publication Date |
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DE208664C true DE208664C (en) |
Family
ID=470683
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DENDAT208664D Active DE208664C (en) |
Country Status (1)
Country | Link |
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DE (1) | DE208664C (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3996071A (en) * | 1973-06-12 | 1976-12-07 | Friedrich Vade Gmbh | Temperature measuring device for use at pressures in excess of 1,500 bar |
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0
- DE DENDAT208664D patent/DE208664C/de active Active
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3996071A (en) * | 1973-06-12 | 1976-12-07 | Friedrich Vade Gmbh | Temperature measuring device for use at pressures in excess of 1,500 bar |
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